WatchedValue object is returned by some [[Trading Terminal]] methods. Using this object you can get/set value and be notified when the value is changed.
value()
Returns current value.
setValue(value)
Sets new value.
subscribe(callback, options)
-
callbackis a function to be called when the value is changed -
optionsis an object with the following properties:-
once- if it is true the callback will be executed only once -
callWithLast- if it is true the callback will be executed with the previous value (if available)
-
unsubscribe(callback)
Use the same function which you used in subscribe function to unsubscribe from the updates.
